#B63B4A
Closest named color: Dull Red (#BB3F3F). oklch(53.4% 0.158 17.4), rgb(182, 59, 74).
Aa
White text reads best on this color (5.65:1).
About this color
#B63B4A is a medium-dark, vivid red. In OKLCH its lightness is 53%, its chroma 0.158 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.022 away. White text reads best on it, at 5.65:1.
| Hue family | Reds |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.158) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #B63B4A |
| RGB | rgb(182, 59, 74) |
| HSL | hsl(353, 51%, 47%) |
| OKLCH | oklch(53.4% 0.158 17.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #B63B4A | 5.65:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #B63B4A | 3.71:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #B63B4A text on white | 5.65:1 | AA | Lc 77.3 | Fine for body text |
| #B63B4A text on black | 3.71:1 | AA large text | Lc -24.5 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 600.
-
Step 50
50
#FCF3F3
oklch(97.1% 0.01 17.3)
-
Step 100
100
#F7E5E5
oklch(93.6% 0.02 17.5)
-
Step 200
200
#F2CFD0
oklch(88.4% 0.039 16)
-
Step 300
300
#EBAFB0
oklch(81% 0.07 17.6)
-
Step 400
400
#DE8286
oklch(70.6% 0.114 17.6)
-
Step 500
500
#D35F69
oklch(63.1% 0.147 17)
-
Step 600
600 (this color)
#B63B4A
oklch(53.4% 0.158 17.4)
-
Step 700
700
#A33341
oklch(49.1% 0.147 17.3)
-
Step 800
800
#852C36
oklch(42.8% 0.122 17.4)
-
Step 900
900
#6B292F
oklch(37.8% 0.094 17.3)
-
Step 950
950
#3F191B
oklch(27.1% 0.059 18.7)
#B63B4A with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #5A574A | 0.174 |
| Deuteranopia (no green cones) | #7A7147 | 0.160 |
| Tritanopia (no blue cones) | #C72041 | 0.040 |
| Achromatopsia (no color) | #676767 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B63B4A
#B63B4A
oklch(53.4% 0.158 17.4)
- #007D7F
#007D7F
oklch(53.5% 0.091 196.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #B63B4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.022
- Dusty Red #B9484E ΔE 0.026
- Dark Rose #B5485D ΔE 0.029
- Light Burgundy #A8415B ΔE 0.035
- Light Maroon #A24857 ΔE 0.042
- Firebrick #B22222 ΔE 0.051
- Rose Red #BE013C ΔE 0.051
- Lipstick Red #C0022F ΔE 0.053
Use #B63B4A in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.